The BMW M3 Competition and Audi RS4 both have 450 horsepower turbocharged six cylinders under the bonnet. These drivers decided to use the full power of the cars on an unlimited stretch of Autobahn.

In the video we can see them do several sprints to top speed, while the 200 kg lighter BMW M3 seems to accelerate slightly faster than the Audi RS4. The limiter of the M3 Competition, however, ensures that at 270 km/h the fun stops, while the RS4 continues at least till 290 km/h.